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Polyurethane-43
AKA “Polyurethane polymer, Film-forming agent”
Ingredient
Ingredient Facts
Polyurethane-43
AKA: Polyurethane polymer, Film-forming agent
Ingredient · Skin Conditioning · EWG: 4
Synthetic
Skin Conditioner
Not Clean
Polyurethane-43 is the polymer that conforms generally to the formula:(structure)
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Provides film
Forming protection
Creates smooth surface barrier
Helps lock in moisture
Traditional Use
Synthetic polymer developed in the mid-20th century. Used in cosmetics as a film-forming and conditioning agent in hair and skin products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR